In the 2.5 years and 30,000 miles I've had the WRX, it has been nearly perfect. Acceleration, even on regular unleaded, is awesome. I'm on the second set of tires, and did a "plus zero" on the stock wheels, and the slightly wider tires definitely improve the handling, although it's still no BMW when it comes to the ride/handling balance. The interior is still an Impreza econobox, but the Momo wheel and upgraded seats make a big improvement in looks and comfort! Overall, by far the best car I've owned.
Turbo! AWD. Economy.
Sunroof for the wagon, 6 speed manual for highway cruising at lower RPM (and better mileage).